<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .bigbox{
            width: 500px;
            height: 300px;
            background-color: rgb(76, 170, 139);
            margin: auto;
        }
        .hang{
            width: 20px;
            height: 100px;
            background-color:rgb(124, 166, 209);
            margin-right: 5px;
        }
    </style>
</head>
<body>
    <div class="bigbox">
    <tr class="hang">
        <td>学号</td>
        <td>姓名</td>
        <td>班级</td>
        <td></td>
        <td></td>
    </tr>
</div>
</body>
</html>